mirror of https://github.com/vapor/docs.git
35 lines
869 B
Markdown
35 lines
869 B
Markdown
# Binary Streams
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WebSockets have separate [text](text-stream.md) and binary data flows.
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Sending binary input to a WebSocket sends it to the remote. Listening for binary on a WebSocket receives binary (and binary continuation) data from clients.
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## Sending binary data
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Sending a `Data` or `ByteBuffer` using a WebSocket sends it to the remote.
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```swift
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webSocket.send(byteBuffer)
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webSocket.send(data)
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```
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## Receiving binary data
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Binary data can be read as a `ByteBuffer` using the following function. Only one closure can read at a time.
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```swift
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webSocket.onBinary { byteBuffer in
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// use the `ByteBuffer`
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}
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```
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Binary data can also, instead, be used as Foundation's `Data`. This is less efficient than `ByteBuffer` but often easier to use.
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```swift
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webSocket.onData { data in
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// use the `Data`
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}
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```
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You can only use one of the two listeners at a time.
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